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annotate piecrust/serving.py @ 128:28444014ce7d

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Fix error reporting and counting of lines.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 14 Nov 2014 22:49:50 +0100
parents de257cc40ce1
children 7f81c84f7ddb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import re
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2 import gzip
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3 import time
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4 import os
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5 import os.path
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6 import hashlib
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7 import logging
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8 import io
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9 from werkzeug.exceptions import (NotFound, MethodNotAllowed,
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10 InternalServerError, HTTPException)
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11 from werkzeug.serving import run_simple
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12 from werkzeug.wrappers import Request, Response
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13 from werkzeug.wsgi import wrap_file
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14 from jinja2 import FileSystemLoader, Environment
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15 from piecrust.app import PieCrust
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16 from piecrust.data.filters import (PaginationFilter, HasFilterClause,
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17 IsFilterClause)
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18 from piecrust.environment import StandardEnvironment
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19 from piecrust.page import Page
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20 from piecrust.processing.base import ProcessorPipeline
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21 from piecrust.rendering import PageRenderingContext, render_page
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22 from piecrust.sources.base import PageFactory, MODE_PARSING
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25 logger = logging.getLogger(__name__)
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28 class ServingEnvironment(StandardEnvironment):
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29 pass
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31
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32 class ServeRecord(object):
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33 def __init__(self):
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34 self.entries = {}
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35
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36 def addEntry(self, entry):
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37 key = self._makeKey(entry.uri, entry.sub_num)
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38 self.entries[key] = entry
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39
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40 def getEntry(self, uri, sub_num):
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41 key = self._makeKey(uri, sub_num)
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42 return self.entries.get(key)
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43
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44 def _makeKey(self, uri, sub_num):
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45 return "%s:%s" % (uri, sub_num)
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46
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47
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48 class ServeRecordPageEntry(object):
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49 def __init__(self, uri, sub_num):
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50 self.uri = uri
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51 self.sub_num = sub_num
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52 self.used_source_names = set()
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54
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55 class Server(object):
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56 def __init__(self, root_dir, host='localhost', port='8080',
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57 debug=False, static_preview=True,
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58 synchronous_asset_pipeline=True):
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59 self.root_dir = root_dir
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60 self.host = host
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61 self.port = port
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62 self.debug = debug
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63 self.static_preview = static_preview
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64 self.synchronous_asset_pipeline = synchronous_asset_pipeline
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65 self._out_dir = None
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66 self._skip_patterns = None
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67 self._force_patterns = None
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68 self._asset_record = None
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69 self._page_record = None
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70 self._mimetype_map = load_mimetype_map()
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71
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72 def run(self):
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73 # Bake all the assets so we know what we have, and so we can serve
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74 # them to the client. We need a temp app for this.
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75 app = PieCrust(root_dir=self.root_dir, debug=self.debug)
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76 mounts = app.assets_dirs
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77 self._out_dir = os.path.join(app.cache_dir, 'server')
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78 self._skip_patterns = app.config.get('baker/skip_patterns')
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79 self._force_patterns = app.config.get('baker/force_patterns')
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80 pipeline = ProcessorPipeline(
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81 app, mounts, self._out_dir,
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82 skip_patterns=self._skip_patterns,
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83 force_patterns=self._force_patterns)
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84 self._asset_record = pipeline.run()
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85 self._page_record = ServeRecord()
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86
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87 # Run the WSGI app.
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88 wsgi_wrapper = WsgiServer(self)
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89 run_simple(self.host, self.port, wsgi_wrapper,
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90 use_debugger=True, use_reloader=True)
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91
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92 def _run_request(self, environ, start_response):
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93 try:
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94 return self._run_piecrust(environ, start_response)
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95 except Exception as ex:
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96 if self.debug:
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97 raise
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98 return self._handle_error(ex, environ, start_response)
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99
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100 def _run_piecrust(self, environ, start_response):
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101 request = Request(environ)
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102
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103 # We don't support anything else than GET requests since we're
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104 # previewing something that will be static later.
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105 if self.static_preview and request.method != 'GET':
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106 logger.error("Only GET requests are allowed, got %s" % request.method)
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107 raise MethodNotAllowed()
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108
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109 # Create the app for this request.
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110 app = PieCrust(root_dir=self.root_dir, debug=self.debug)
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111 app.config.set('site/root', '/')
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112 app.config.set('site/pretty_urls', True)
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113 app.config.set('server/is_serving', True)
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114
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115 # We'll serve page assets directly from where they are.
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116 app.env.base_asset_url_format = '/_asset/%path%'
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117
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118 # See if the requested URL is an asset.
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119 response = self._try_serve_asset(app, environ, request)
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120 if response is not None:
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121 return response(environ, start_response)
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122
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123 # It's not an asset we know of... let's see if it can be a page asset.
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124 response = self._try_serve_page_asset(app, environ, request)
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125 if response is not None:
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126 return response(environ, start_response)
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127
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128 # Nope. Let's hope it's an actual page.
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129 try:
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130 response = self._try_serve_page(app, environ, request)
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131 return response(environ, start_response)
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132 except HTTPException as ex:
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diff changeset
133 raise
3
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diff changeset
134 except (RouteNotFoundError, SourceNotFoundError) as ex:
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135 logger.exception(ex)
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136 raise NotFound()
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137 except Exception as ex:
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138 if app.debug:
128
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diff changeset
139 logger.exception(ex)
3
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140 raise
128
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diff changeset
141 msg = str(ex)
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142 logger.error(msg)
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diff changeset
143 raise InternalServerError(msg)
3
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144
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145 def _try_serve_asset(self, app, environ, request):
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146 logger.debug("Searching for asset with path: %s" % request.path)
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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147 rel_req_path = request.path.lstrip('/').replace('/', os.sep)
128
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148 entry = self._asset_record.previous.findEntry(rel_req_path)
3
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diff changeset
149 if entry is None:
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150 return None
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151
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152 # Yep, we know about this URL because we processed an asset that
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153 # maps to it... make sure it's up to date by re-processing it
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154 # before serving.
39
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diff changeset
155 mounts = app.assets_dirs
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156 asset_in_path = entry.path
3
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157 asset_out_path = os.path.join(self._out_dir, rel_req_path)
110
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diff changeset
158
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159 if self.synchronous_asset_pipeline:
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160 pipeline = ProcessorPipeline(
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diff changeset
161 app, mounts, self._out_dir,
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162 skip_patterns=self._skip_patterns,
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163 force_patterns=self._force_patterns)
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diff changeset
164 pipeline.run(asset_in_path)
3
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165
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166 logger.debug("Serving %s" % asset_out_path)
7
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diff changeset
167 wrapper = wrap_file(environ, open(asset_out_path, 'rb'))
3
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168 response = Response(wrapper)
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169 _, ext = os.path.splitext(rel_req_path)
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170 response.mimetype = self._mimetype_map.get(
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171 ext.lstrip('.'), 'text/plain')
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172 return response
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173
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174 def _try_serve_page_asset(self, app, environ, request):
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175 if not request.path.startswith('/_asset/'):
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176 return None
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177
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178 full_path = os.path.join(app.root_dir, request.path[len('/_asset/'):])
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179 if not os.path.isfile(full_path):
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180 return None
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181
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182 logger.debug("Serving %s" % full_path)
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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diff changeset
183 wrapper = wrap_file(environ, open(full_path, 'rb'))
3
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diff changeset
184 response = Response(wrapper)
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diff changeset
185 _, ext = os.path.splitext(full_path)
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186 response.mimetype = self._mimetype_map.get(
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diff changeset
187 ext.lstrip('.'), 'text/plain')
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188 return response
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diff changeset
189
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190 def _try_serve_page(self, app, environ, request):
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diff changeset
191 # Try to find what matches the requested URL.
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diff changeset
192 req_path = request.path
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diff changeset
193 page_num = 1
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diff changeset
194 pgn_suffix_re = app.config.get('__cache/pagination_suffix_re')
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diff changeset
195 pgn_suffix_m = re.search(pgn_suffix_re, request.path)
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diff changeset
196 if pgn_suffix_m:
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diff changeset
197 req_path = request.path[:pgn_suffix_m.start()]
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diff changeset
198 page_num = int(pgn_suffix_m.group('num'))
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diff changeset
199
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diff changeset
200 routes = find_routes(app.routes, req_path)
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diff changeset
201 if len(routes) == 0:
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diff changeset
202 raise RouteNotFoundError("Can't find route for: %s" % req_path)
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diff changeset
203
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diff changeset
204 taxonomy = None
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diff changeset
205 for route, route_metadata in routes:
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diff changeset
206 source = app.getSource(route.source_name)
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diff changeset
207 if route.taxonomy is None:
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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diff changeset
208 rel_path, fac_metadata = source.findPagePath(
3
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diff changeset
209 route_metadata, MODE_PARSING)
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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diff changeset
210 if rel_path is not None:
3
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diff changeset
211 break
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diff changeset
212 else:
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diff changeset
213 taxonomy = app.getTaxonomy(route.taxonomy)
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diff changeset
214 term_value = route_metadata.get(taxonomy.term_name)
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diff changeset
215 if term_value is not None:
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diff changeset
216 tax_page_ref = taxonomy.getPageRef(source.name)
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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diff changeset
217 rel_path = tax_page_ref.rel_path
3
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diff changeset
218 source = tax_page_ref.source
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diff changeset
219 fac_metadata = {taxonomy.term_name: term_value}
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parents:
diff changeset
220 break
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parents:
diff changeset
221 else:
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diff changeset
222 raise SourceNotFoundError("Can't find path for: %s "
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diff changeset
223 "(looked in: %s)" %
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diff changeset
224 (req_path, [r.source_name for r, _ in routes]))
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parents:
diff changeset
225
113
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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parents: 111
diff changeset
226 # Build the page.
11
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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parents: 7
diff changeset
227 fac = PageFactory(source, rel_path, fac_metadata)
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diff changeset
228 page = fac.buildPage()
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
229 render_ctx = PageRenderingContext(page, req_path, page_num)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
230 if taxonomy is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
231 flt = PaginationFilter()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
232 if taxonomy.is_multiple:
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diff changeset
233 flt.addClause(HasFilterClause(taxonomy.name, term_value))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
234 else:
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diff changeset
235 flt.addClause(IsFilterClause(taxonomy.name, term_value))
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diff changeset
236 render_ctx.pagination_filter = flt
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
237 render_ctx.custom_data = {
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
238 taxonomy.term_name: term_value}
113
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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parents: 111
diff changeset
239
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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diff changeset
240 # See if this page is known to use sources. If that's the case,
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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parents: 111
diff changeset
241 # just don't use cached rendered segments for that page (but still
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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parents: 111
diff changeset
242 # use them for pages that are included in it).
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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diff changeset
243 entry = self._page_record.getEntry(req_path, page_num)
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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parents: 111
diff changeset
244 if (taxonomy is not None or entry is None or
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parents: 111
diff changeset
245 entry.used_source_names):
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diff changeset
246 cache_key = '%s:%s' % (req_path, page_num)
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parents: 111
diff changeset
247 app.env.rendered_segments_repository.invalidate(cache_key)
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parents: 111
diff changeset
248
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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diff changeset
249 # Render the page.
3
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diff changeset
250 rendered_page = render_page(render_ctx)
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diff changeset
251 rp_content = rendered_page.content
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parents:
diff changeset
252
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 113
diff changeset
253 if taxonomy is not None:
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parents: 113
diff changeset
254 paginator = rendered_page.data.get('pagination')
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parents: 113
diff changeset
255 if (paginator and paginator.is_loaded and
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parents: 113
diff changeset
256 len(paginator.items) == 0):
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parents: 113
diff changeset
257 message = ("This URL matched a route for taxonomy '%s' but "
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parents: 113
diff changeset
258 "no pages have been found to have it. This page "
28444014ce7d Fix error reporting and counting of lines.
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parents: 113
diff changeset
259 "won't be generated by a bake." % taxonomy.name)
28444014ce7d Fix error reporting and counting of lines.
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parents: 113
diff changeset
260 raise NotFound(message)
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parents: 113
diff changeset
261
113
de257cc40ce1 Re-enable proper caching of rendered segments in server.
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parents: 111
diff changeset
262 if entry is None:
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parents: 111
diff changeset
263 entry = ServeRecordPageEntry(req_path, page_num)
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diff changeset
264 self._page_record.addEntry(entry)
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diff changeset
265 entry.used_source_names = set(render_ctx.used_source_names)
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diff changeset
266
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diff changeset
267 # Profiling.
7
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diff changeset
268 if app.debug:
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diff changeset
269 now_time = time.clock()
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diff changeset
270 timing_info = ('%8.1f ms' %
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diff changeset
271 ((now_time - app.env.start_time) * 1000.0))
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diff changeset
272 rp_content = rp_content.replace('__PIECRUST_TIMING_INFORMATION__',
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diff changeset
273 timing_info)
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diff changeset
274
113
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diff changeset
275 # Build the response.
3
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diff changeset
276 response = Response()
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diff changeset
277
7
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diff changeset
278 etag = hashlib.md5(rp_content.encode('utf8')).hexdigest()
3
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diff changeset
279 if not app.debug and etag in request.if_none_match:
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diff changeset
280 response.status_code = 304
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diff changeset
281 return response
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282
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diff changeset
283 response.set_etag(etag)
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diff changeset
284 response.content_md5 = etag
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diff changeset
285
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diff changeset
286 cache_control = response.cache_control
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diff changeset
287 if app.debug:
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288 cache_control.no_cache = True
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diff changeset
289 cache_control.must_revalidate = True
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290 else:
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291 cache_time = (page.config.get('cache_time') or
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diff changeset
292 app.config.get('site/cache_time'))
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diff changeset
293 if cache_time:
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294 cache_control.public = True
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295 cache_control.max_age = cache_time
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diff changeset
296
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diff changeset
297 content_type = page.config.get('content_type')
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298 if content_type and '/' not in content_type:
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299 mimetype = content_type_map.get(content_type, content_type)
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diff changeset
300 else:
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diff changeset
301 mimetype = content_type
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diff changeset
302 if mimetype:
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diff changeset
303 response.mimetype = mimetype
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diff changeset
304
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diff changeset
305 if ('gzip' in request.accept_encodings and
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diff changeset
306 app.config.get('site/enable_gzip')):
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diff changeset
307 try:
7
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diff changeset
308 with io.BytesIO() as gzip_buffer:
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diff changeset
309 with gzip.open(gzip_buffer, mode='wt',
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parents: 5
diff changeset
310 encoding='utf8') as gzip_file:
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diff changeset
311 gzip_file.write(rp_content)
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parents: 5
diff changeset
312 rp_content = gzip_buffer.getvalue()
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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diff changeset
313 response.content_encoding = 'gzip'
3
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parents:
diff changeset
314 except Exception:
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parents:
diff changeset
315 logger.exception("Error compressing response, "
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
316 "falling back to uncompressed.")
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
317 response.set_data(rp_content)
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parents:
diff changeset
318
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diff changeset
319 return response
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diff changeset
320
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
321 def _handle_error(self, exception, environ, start_response):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
322 path = 'error'
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parents:
diff changeset
323 if isinstance(exception, NotFound):
128
28444014ce7d Fix error reporting and counting of lines.
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diff changeset
324 path += '404'
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diff changeset
325 description = str(exception)
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parents: 113
diff changeset
326 if isinstance(exception, HTTPException):
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parents: 113
diff changeset
327 description = exception.description
3
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diff changeset
328 env = Environment(loader=ErrorMessageLoader())
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diff changeset
329 template = env.get_template(path)
128
28444014ce7d Fix error reporting and counting of lines.
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diff changeset
330 context = {'details': description}
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
331 response = Response(template.render(context), mimetype='text/html')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
332 return response(environ, start_response)
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parents:
diff changeset
333
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
334
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diff changeset
335 class WsgiServer(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
336 def __init__(self, server):
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diff changeset
337 self.server = server
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parents:
diff changeset
338
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diff changeset
339 def __call__(self, environ, start_response):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
340 return self.server._run_request(environ, start_response)
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parents:
diff changeset
341
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diff changeset
342
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
343 class RouteNotFoundError(Exception):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
344 pass
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diff changeset
345
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
346
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diff changeset
347 class SourceNotFoundError(Exception):
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parents:
diff changeset
348 pass
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parents:
diff changeset
349
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parents:
diff changeset
350
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diff changeset
351 content_type_map = {
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diff changeset
352 'html': 'text/html',
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
353 'xml': 'text/xml',
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
354 'txt': 'text/plain',
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
355 'text': 'text/plain',
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diff changeset
356 'css': 'text/css',
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diff changeset
357 'xhtml': 'application/xhtml+xml',
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parents:
diff changeset
358 'atom': 'application/atom+xml', # or 'text/xml'?
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parents:
diff changeset
359 'rss': 'application/rss+xml', # or 'text/xml'?
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parents:
diff changeset
360 'json': 'application/json'}
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parents:
diff changeset
361
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parents:
diff changeset
362
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
363 def find_routes(routes, uri):
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parents:
diff changeset
364 uri = uri.lstrip('/')
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parents:
diff changeset
365 res = []
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parents:
diff changeset
366 for route in routes:
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diff changeset
367 m = route.uri_re.match(uri)
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parents:
diff changeset
368 if m:
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parents:
diff changeset
369 metadata = m.groupdict()
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parents:
diff changeset
370 res.append((route, metadata))
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parents:
diff changeset
371 return res
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parents:
diff changeset
372
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parents:
diff changeset
373
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
374 class ErrorMessageLoader(FileSystemLoader):
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diff changeset
375 def __init__(self):
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diff changeset
376 base_dir = os.path.join(os.path.dirname(__file__), 'resources',
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
377 'messages')
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parents:
diff changeset
378 super(ErrorMessageLoader, self).__init__(base_dir)
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parents:
diff changeset
379
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parents:
diff changeset
380 def get_source(self, env, template):
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diff changeset
381 template += '.html'
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parents:
diff changeset
382 return super(ErrorMessageLoader, self).get_source(env, template)
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parents:
diff changeset
383
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parents:
diff changeset
384
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
385 def load_mimetype_map():
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parents:
diff changeset
386 mimetype_map = {}
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parents:
diff changeset
387 sep_re = re.compile(r'\s+')
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parents:
diff changeset
388 path = os.path.join(os.path.dirname(__file__), 'mime.types')
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parents:
diff changeset
389 with open(path, 'r') as f:
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parents:
diff changeset
390 for line in f:
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parents:
diff changeset
391 tokens = sep_re.split(line)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
392 if len(tokens) > 1:
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parents:
diff changeset
393 for t in tokens[1:]:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
394 mimetype_map[t] = tokens[0]
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parents:
diff changeset
395 return mimetype_map
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
396